Dispersive effects from a comparison of electron and positron scattering from $^{12}$C
Dispersive effects from a comparison of electron and positron scattering from $^{12}$C
复制标题
$^{12}$C 电子和正电子散射比较的色散效应
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
M. Traini
中科院分区：
文献类型：
--
作者：
P. Guèye;M. Bernheim;J. Danel;J. Ducret;L. Lakehal;J. Goff;A. Magnon;C. Marchand;J. Morgenstern;J. Marroncle;P. Vernin;A. Zghiche;V. Breton;S. Frullani;F. Garibaldi;F. Ghio;M. Jodice;D. Isabelle;Z. Meziani;E. Offermann;M. Traini
通过比较电子和正电子在Saclay直线加速器上的弹性散射，研究了色散效应。结果表明，在能量为262 MeV和450 MeV时，色散效应比第一个衍射值[0.95<；q{SUEP}(Fm{sup-1})<；1.66]低不到2%，与Friar和Rosen的预测一致。在这个极小值的位置(Q=1.84Fm{sup-1})，正电子散射截面与由电子计算结果得到的截面之间的偏差为-44%-30%。
Dispersive effects have been investigated by comparing elastic scattering of electrons and positrons from {sup 12}C at the Saclay Linear Accelerator. The results demonstrate that dispersive effects at energies of 262 MeV and 450 MeV are less than 2% below the first diffraction minimum [0.95 < q{sub eff} (fm{sup -1}) < 1.66] in agreement with the prediction of Friar and Rosen. At the position of this minimum (q{sub eff} = 1.84 fm{sup -1}), the deviation between the positron scattering cross section and the cross section derived from the electron results is -44% {+-} 30%.